Provide ipaddress stub in third_party/2 ?

[jlaine]

For Python 3 we have stubs for the stdlib's ipaddress module. For Python 2, ipaddress is not part of the standard library but is available as third party package, much like enum.

Is the proper way to handle this to copy over ipaddress to third_party/2?

[JelleZijlstra]

Yes, assuming the backport's API is the same as the one in the stdlib. We could add a test in check_consistent.py to ensure that the two copies stay in sync.

[jlaine]

This was fixed in 57384ce